Heat Transfer,Refrigeration and Air Conditioning MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Heat Transfer,Refrigeration and Air Conditioning, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Heat Transfer,Refrigeration and Air Conditioning MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Heat Transfer,Refrigeration and Air Conditioning mcq questions that explore various aspects of Heat Transfer,Refrigeration and Air Conditioning problems. Each MCQ is crafted to challenge your understanding of Heat Transfer,Refrigeration and Air Conditioning principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Heat Transfer,Refrigeration and Air Conditioning MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Heat Transfer,Refrigeration and Air Conditioning. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Heat Transfer,Refrigeration and Air Conditioning knowledge to the test? Let's get started with our carefully curated MCQs!

Heat Transfer,Refrigeration and Air Conditioning MCQs | Page 22 of 40

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Q211.
The temperature of air recorded by a thermometer, when its bulb is surrounded by a wet cloth exposed to the air, is called
Discuss
Answer: (a).wet bulb temperature
Q212.
During sub-cooling, sensible heat from a liquid refrigerant is removed.
Discuss
Answer: (a).Yes
Q213.
The expression is used for calculating relative humidity.
Discuss
Answer: (b).No
Q214.
If the energy radiated per second per sq. cm. of the surface for wave lengths lying between λ, and λ + dλ is represented by (eλ.dλ), then eλ is called
Discuss
Answer: (b).emissive power
Q215.
The wet bulb depression indicates __________ humidity of the air.
Discuss
Answer: (b).relative
Q216.
The refrigerant widely used in domestic refrigerators is
Discuss
Answer: (d).R-12
Q217.
When absorptivity (α) = 1, reflectivity (ρ) = 0 and transmittivity (τ) = 0, then the body is said to be a
Discuss
Answer: (a).black body
Q218.
Prandtl number (PN) is given by PN = μ.cp/k.
Discuss
Answer: (a).Yes
Q219.
In a vapour compression system, the condition of refrigerant before passing through the condenser is
Discuss
Answer: (d).superheated vapour
Q220.
A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be
Discuss
Answer: (d).2 k₁ k₂/ (k₁ + k₂)